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Combine harvester with variable stroke cleaning shoe

Active Publication Date: 2016-08-16
BLUE LEAF I P
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a durable sieve drive assembly that is perfect for use in a combine harvester during the harvesting process. It is designed to withstand the challenging conditions that are present inside the harvester.

Problems solved by technology

For example, when the combine harvester moves downhill, the angle of the sieve relative to the horizontal will become steeper, with the result that the mixture of grain and material other than grain travels over the sieve slower and more material accumulates on the sieve.
The known system of EP 1712122 however has serious durability problems in the harsh working conditions inside a combine harvester.

Method used

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  • Combine harvester with variable stroke cleaning shoe
  • Combine harvester with variable stroke cleaning shoe
  • Combine harvester with variable stroke cleaning shoe

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0065]By changing the rotational speed of the rotatable output shaft 12 of the rotary drive 11, the sieve frequency of the reciprocating sieve movement can be changed. FIG. 3 shows a transmission 20 of a sieve drive assembly according to the invention. In this embodiment, the transmission 20 comprises a single adjustable transmission element. There is no adjustable eccentric device; in this embodiment, the eccentric device has a fixed eccentricity.

[0066]The transmission 20 of FIG. 3 comprises an eccentric device 21, which is a non-adjustable eccentric device. The eccentric device has an eccentric disk 22 that is connected to the rotatable output shaft of the rotary drive (not shown in FIG. 3) in a fixed way, causing the eccentric disk 22 to rotate along with the rotatable output shaft, for example as indicated by the arrow. The eccentric disk 22 is connected to the rotatable output shaft of the rotary drive at a location away from the center of the eccentric disk 22.

[0067]The transm...

second embodiment

[0076]FIG. 4 shows a transmission 20 of a sieve drive assembly according to the invention. In this embodiment, the transmission 20 comprises a single adjustable transmission element. There is no adjustable eccentric device; in this embodiment the eccentric device has a fixed eccentricity.

[0077]The transmission 20 of FIG. 4 comprises an eccentric device 21, which is a non-adjustable eccentric device. The eccentric device has an eccentric disk 22 that is connected to the rotatable output shaft of the rotary drive (not shown in FIG. 4) in a fixed way, causing the eccentric disk 22 to rotate along with the rotatable output shaft, for example as indicated by the arrow. The eccentric disk 22 is connected to the rotatable output shaft of the rotary drive at a location away from the center of the eccentric disk 22.

[0078]The transmission 20 further comprises four transmission elements 31, 32, 33, 40. One transmission element is an adjustable transmission element 40.

[0079]The transmission 20 ...

third embodiment

[0086]FIG. 5 shows a transmission 20 of a sieve drive assembly according to the invention. In this embodiment, the transmission 20 comprises an adjustable transmission element. There is no adjustable eccentric device; the eccentric device has a fixed eccentricity.

[0087]The transmission 20 of FIG. 5 comprises an eccentric device 21, which is a non-adjustable eccentric device. The eccentric device has an eccentric disk 22 that is connected to the rotatable output shaft of the rotary drive (not shown in FIG. 4) in a fixed way, causing the eccentric disk 22 to rotate along with the rotatable output shaft, for example as indicated by the arrow. The eccentric disk 22 is connected to the rotatable output shaft of the rotary drive at a location away from the center of the eccentric disk 22.

[0088]In the embodiment of FIG. 5, the transmission 20 comprises an adjustable transmission element 40. In this embodiment, the adjustable transmission element 40 is formed by an actuator, for example a h...

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Abstract

A sieve for a combine harvester that is moveable by a sieve drive assembly to perform a reciprocating sieve movement having a sieving stroke and a sieve throwing angle, wherein the sieve drive assembly has a rotary drive, having a rotatable output shaft, a transmission between the rotatable output shaft of the rotary drive and the sieve, an eccentric device, at least one transmission element, and a plurality of linkage pivots, wherein the eccentric device is an adjustable eccentric device in which the eccentricity is adjustable in order to adjust at least one of the sieving stroke and sieve throwing angle, the eccentric device comprising an input shaft, a flange, a gear, an output shaft, an annular gear, and an adjustment gear.

Description

[0001]This application claims the benefit of and priority to Belgium Patent Application No. BE2014 / 0281, filed Apr. 22, 2014, entitled COMBINE HARVESTER, which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The invention pertains to a combine harvester, in particular to the drive of a sieve in the cleaning shoe of a combine harvester.BACKGROUND OF THE INVENTION[0003]Combine harvesters are widely used in the harvesting of various types of grain. Typically, a combine harvester comprises a cutter bar, which cuts the crop from the field. The harvested crop is threshed inside the combine harvester. The stalks of the harvested crop are generally removed from the combine harvester via a straw walker and a mixture of grain and smaller particles of material other than grain remains in the combine harvester.[0004]This mixture is transported to a cleaning shoe, in which the threshed grain is separated from the material other than grain. The cleaning shoe genera...

Claims

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Application Information

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IPC IPC(8): A01F12/32A01D41/127A01D75/28A01D41/12A01F12/56A01F12/44B07B1/00
CPCA01D41/12A01F12/448A01F12/56A01D41/1276A01D75/282A01F12/446
Inventor MISSOTTEN, BART M. A.MOUTTON, BARTDE COOMAN, BRUNORAMON, MARC E.TALLIR, FREDERIK
Owner BLUE LEAF I P
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